Stuntman!: My Car-Crashing, Plane-Jumping, Bone-Breaking, Death-Defying Hollywood Life. A new Book by stuntman Hal Needham. Probably more famous for his collaborations with Burt Reynolds in the 70s and 80s, he also worked often with Duke.
Looks like a great read, but one of the "blurbs" I read had a comment from Hal stating he taught Duke how to throw a movie punch(?!).